Magnetic / Position Detection Sensor

Magnetic (Reed) Proximity Sensor

A magnetic reed proximity sensor detects magnetic fields using a reed switch mechanism. It is commonly used in pneumatic cylinders, door position sensing, machine automation, security systems, and industrial position feedback applications.

Detects magnetic field presence
Widely used in pneumatic cylinders
Supports position and end-stop sensing
Ideal for industrial IoT monitoring

What is a Magnetic Reed Sensor?

A reed proximity sensor uses a reed switch that closes or opens when exposed to a magnetic field. This allows it to detect movement, position, or object presence.

Industrial Meaning

Reed sensors are commonly mounted on pneumatic cylinders, doors, moving machine assemblies, and automation equipment to detect travel position or movement.

Why it Matters

They provide reliable, non-contact magnetic sensing with low power consumption and simple integration.

1

Magnet moves

Magnetic target approaches sensor.

2

Field detected

Reed switch responds to field.

3

Contacts switch

Internal contacts open or close.

4

Signal generated

Controller receives status signal.

Working Principle

Reed sensors contain two thin ferromagnetic contacts sealed inside a glass tube. When a magnetic field comes near, the contacts attract and complete the electrical circuit.

Typical Applications

  • Pneumatic cylinder sensing
  • Door open/close sensing
  • Position monitoring
  • Safety interlock systems

Where the Signal Goes

  • PLC / SCADA system
  • Pneumatic controller
  • Safety interlock logic
  • IoT gateway and cloud platform

Industrial Applications

Magnetic reed sensors are used wherever magnetic position or movement detection is needed.

Pneumatic Cylinders Detects piston position and movement.
Door Monitoring Tracks open and close status.
Machine Automation Useful for travel and end-stop detection.
Security Systems Monitors unauthorized opening events.
Conveyor Systems Detects movement and object passage.
IoT Monitoring Supports remote status and alarms.

Typical Technical Specifications

Exact specifications depend on magnetic sensitivity, switching voltage, mounting type, and industrial enclosure.

Parameter Typical Range Notes
Measured Quantity Magnetic Presence / Position Magnetic field detection
Detection Range Few mm to several cm Depends on magnet strength
Measurement Principle Magnetic Reed Switch Magnetic contact switching
Outputs Digital / Relay Industrial automation compatible
Communication Digital / PLC interface Depends on integration method
Supply Voltage 5V, 12V, 24V Depends on design
Operating Temperature -10°C to +70°C typical Industrial models vary
Installation Cylinder / Bracket Mount Depends on application

IoT Integration

Reed sensing becomes more powerful when connected to industrial IoT dashboards and remote monitoring systems.

Gateway Integration

The sensor can communicate through digital outputs to PLCs, gateways, or industrial controllers.

Dashboard Logic

Dashboards may show cylinder movement, door status, machine travel state, and event history.

Common Alarm / Action Conditions

  • Door open event
  • Cylinder not reaching end position
  • Travel timeout alarm
  • Unexpected movement detection
  • Sensor signal loss

Frequently Asked Questions

Common questions about magnetic reed sensing systems.

Why use reed sensors?

Reed sensors are compact, low-power, reliable, and simple for magnetic position detection.

Where are reed sensors commonly used?

They are widely used in pneumatic cylinders, doors, machine travel sensing, and automation systems.

Can the sensor data be monitored remotely?

Yes. Sensor events can be integrated into IoT dashboards, alarm systems, and cloud platforms.

Hexitronics Industrial IoT Integration

Magnetic reed sensing is a strong part of industrial automation. When integrated with IoT systems, it enables remote visibility, position tracking, event logging, and predictive monitoring.